(2aR,5R,7aR)-2a-(tert-Butyl-dimethyl-silanyloxymethyl)-5-(2-methoxymethoxy-ethyl)-6,6-dimethyl-2-methylene-hexahydro-cyclobuta[c]pentalen-3-one

[(1R,3aR,4R,6aR)-1-(2-Hydroxy-ethyl)-2,2-dimethyl-5-oxo-4-phenylsulfanylmethyl-hexahydro-pentalen-3a-yl]-acetic acid methyl ester

tert-Butyl-[6-(2-methoxymethoxy-ethyl)-5,5-dimethyl-oct-7-en-2-ynyloxy]-dimethyl-silane

3-(2-Methoxymethoxy-ethyl)-4,4-dimethyl-hept-1-en-6-yne

methyl 5-(1,3-dioxolan-2-yl)-5-methyl-3-oxohexanoate